You can apply for a refund on the order details page.
Tips
usage
Boilerplate phrase on Taobao, JD, Meituan etc. 申请退款 = open the refund request; 退款成功 (tuìkuǎn chénggōng) 'refund successful' = money returned. Compare 退货 (tuìhuò) 'return the goods' (you also send the item back) vs. 退款 'refund only.'